Motion-picture apparatus.



F. C. HAMILTON.,

MTION PICTURE' APPARATUS.

APPLICATION FILED 1AN.2|. 191s.

HNI'

Patented Oct. 30, im?.

FRANK C. HAMILTON, OF NEW YORK, N. Y., ASSIGNOR TO EUREKA 'EROJECTOR DEVICE CO., NC., OE NEW YORK, N. Y., A CREORATION GF NEX/J YORK.

` JOTION-CTURE PPARATUS.

mieres,

[application 'filed January 2, 1916.

T 0 all whom t may concern Be it known that l, FRANK C. HAMILTON, a citizen of the United States, residing at New York. in the county or" New Yer r and State of New York., have invented certain new and useful llmprovements in Motion- Picture Apparatus, of which the 'following is a specification.

rlhe object of my invention is to provide means whereby the shutter o'f a moving picture machine haring two or more sectors maybe made to balance perfectly without changing the construction of the said shutter. This will eliminate the uneven rotation and lvibration present in shl'itters not provided with my improvement," caused by the unequal weight of the sectors of the shutter.

Another object ot my invention is to provide means whereby the sectors of a shutter are held in their predetermined position, and prevented from coming leose., which is an objectionable feature in that type orc shutter in which the sectors are not a part of the carrier and rim.

My invention includes balancing .*eight units which are held in or by the rim a moving picture shutter between the sectors of the said shutter, wherever they may he required to cause the shutter to balance pericectly. These units in ene :t n ot the device, also act as braces between sectors, to maintain them in proper spaced relation.

ln the acccmpanyingY1 drawings, whi l to be taken as a part of ehis specificatid and in which ll have sho-wn a. merely preerred form of embodiment of the invention, Figure 1 is a front view oKQ e no c picture shutter witpart et the ri away; lEig. 2 is a side elevation of ter shown in Fig. l; Fig. 3 is an enlarged View of part of the rim of the shutter shown in Fig. l; llig. 4 is a detail view of one el@ the weight members; Figs. 5, 6, T and 8 show modied forms of constructionu Referring to the numerals on the draw ings, l indicates a moving pictureyshutter having a. carrier 2, sectors 3, 3, 3, a l til-shaped in cross section, asnank Specification o1 etters Patent.

Patented @etz Slt, litt?.

Serial No. 73,273.

tities in rim so as to cause the shutter to balance pertectly. These weight members also act as braces between the. sectors 3 3, extending as they do from sector to sector. They are held in position by 'crimping the under side vot the rim (Je, as indicated at 8.

The modii'ied arrangement shown in Figs. and 6 includes weight members 7n, in the orm of blocks, held in the rim l by crimping the under edges of the said rim as at 8a (Fig:

rllhe modification shown inltigs. 7 and 8 includes weight members 7b in the torni of balls held in rim l by crimping the under side of said rim as at 8' (Fig. 8) se as to hold the balls lb any predetermined point of the rim.

In all of the above forms the number and position oi the weight members are determined by the balance et the shutter. .fr balancing weight is puty into positien and ycured wherever required. Lind besides arf" for c distribution of wei@ ot the rim, cont .r weights toward ar tion. Thus in Fin".

e proportion weigi Similarly the blocks "./f laminated sections, instead of chines, a carrier, a. plurality of sectors raf" dially mounted on said carrier, a. U-

rl`he shank or bushing f er .le

shaped in cross section around the. outer edge of'said sectors, and a Weight strip held the same.

chilies, a carrier, a plurality of sectors raT dially mounted on said carrier, a rim U- FRANK o. HAMILTON.l

said rim between said sectors for bracing 2, In a shutter for moving picture ma- 

